3-pyridyloxyphenyldihydrouracil compound and use thereof

ABSTRACT

Provided is a compound represented by formula (1): 
     
       
         
         
             
             
         
       
     
     The compound represented by formula (1) has an excellent efficacy for controlling plant diseases, and is thus useful as an active ingredient for an agent for controlling plant diseases.

TECHNICAL FIELD

This application claims priority to and the benefit of Japanese PatentApplication No. 2016-165426 filed Aug. 26, 2016, the entire contents ofwhich are incorporated herein by reference.

The present invention is related to a 3-pyridyloxyphenyl dihydrouracilcompound and a use of the same.

BACKGROUND ART

Hitherto, for controlling plant diseases, many compounds have beendeveloped and used practically (see, Non-Patent Literature 1).

CITATION LIST Non-Patent Document

Non-Patent Document 1: The Pesticide Manual-16th edition, published byBritish Crop Protection Council (BCPC), ISBN 978-1-901396-86-7

SUMMARY OF THE INVENTION Problems to be Solved by Invention

An object of the present invention is to provide a compound having anexcellent efficacy for controlling plant diseases.

Means to Solve Problems

The present inventor has intensively studied to find out a compoundhaving an excellent control efficacy on plant diseases. As a result, hefound out that a compound represented by the following formula (1) hasan excellent control efficacy on plant diseases.

That is, the present invention includes the followings.

[1] A compound represented by formula (1):

(hereinafter, referred to as “Compound of the present invention” or“Present compound”).[2] An agent for controlling a plant disease which comprises thecompound described in [1] (hereinafter, referred to as “Control agent ofthe present invention” or “Present control agent”).[3] A method for controlling a plant disease which comprises applying aneffective amount of the compound described in [1] to a plant or soil forcultivating the plant.[4] Use of the compound described in [1] to control a plant disease.

Effect of Invention

According to the invention, plant diseases can be controlled.

Mode for Carrying Out the Invention

The control agent of the present invention is usually prepared by mixingthe compound of the present invention with a solid carrier, a liquidcarrier, an oil and/or a surfactant and the others, and if necessary,adding other auxiliary agents for formulation such as binders,dispersants and stabilizers and the others, to formulate into wettablepowders, water-dispersible granules, flowables, granules, dry flowables,emulsifiable concentrates, aqueous solutions, oils, smoking agents,aerosols, microcapsules, and the others. Such formulations compriseusually 0.1 to 99%, preferably 0.2 to 90% by weight of the presentcompound.

Examples of the solid carrier include fine powders or granules of clays(for example, kaolin clay, diatomaceous earth, synthetic hydratedsilicon oxides, Fubasami clay, bentonite, or acid white clay), talcs,other inorganic minerals (for example, sericite, quartz powders, sulfurpowders, active carbon, calcium carbonate or hydrated silica).

Examples of the liquid carrier include water; alcohols (for example,methanol or ethanol); ketones (for example, acetone or methyl ethylketone); aromatic hydrocarbons (for example, toluene, xylene, ethylbenzene or methylnaphthalene); aliphatic hydrocarbons (for example,hexane, cyclohexane or kerosene); esters (for example, ethyl acetate orbutyl acetate); nitriles (for example, acetonitrile orisobutyronitrile); ethers (for example, diisopropyl ether); amides (forexample, dimethylformamide or dimethylacetamide); and sulfoxides (forexample, dimethyl sulfoxide).

Examples of the surfactants include alkyl sulfates, alkyl sulfonates,alkyl aryl sulfonates, alkyl aryl ethers, and polyoxyethylenatedcompounds thereof, polyethylene glycol ethers, polyhydric alcohol estersand sugar alcohol derivatives.

Examples of the other auxiliary agents for formulation include a binder,a dispersant, and a stabilizer. Specific examples include casein,gelatin, polysaccharides (for example, starch, gum arabic, cellulosederivatives or alginic acid), lignin derivatives, bentonite, sugars,water-soluble synthetic polymers (for example, polyvinyl alcohol,polyvinyl pyrrolidone or polyacrylic acids), PAP (acidic isopropylphosphate), BHT (2,6-di-tert-butyl-4-methylphenol), BHA (a mixture of2-tert-butyl-4-methoxyphenol and 3-tert-butyl-4-methoxyphenol), plantoil, mineral oil, fatty acid and the others.

Examples of the oils and the surfactants that may be mixed with thepresent compound include Nimbus (registered trademark), Assist(registered trademark), Aureo (registered trademark), Iharol (registeredtrademark), Silwet L-77 (registered trademark), BreakThru (registeredtrademark), Sundancell (registered trademark), Induce (registeredtrademark), Penetrator (registered trademark), AgriDex (registeredtrademark), Lutensol A8 (registered trademark), NP-7 (registeredtrademark), Triton (registered trademark), Nufilm (registeredtrademark), Emulgator NP7 (registered trademark), Emulad (registeredtrademark), TRITON X 45 (registered trademark), AGRAL 90 (registeredtrademark), AGROTIN (registered trademark), ARPON (registeredtrademark), EnSpray N (registered trademark), BANOLE (registeredtrademark), and the others.

The compound of the present invention may be applied as a control agentof the present invention. Examples of a method for applying the controlagent of the present invention is not limited to a specific method aslong as the control agent of the present invention can be applied in asubstantial applicable form, and include an application to a plant bodysuch as a foliar application, an application to a cultivation area ofplant such as a soil treatment, an application to seeds such as a seeddisinfection, and the others.

The application rate of the compound of the present invention used inthe control method of the present invention may be varied depending on akind of plant to be applied, a kind and a frequency of occurrence ofplant diseases to be controlled, a formulation form, a timing ofapplication, an application method, an application site, a climatecondition, and the others. For example, when the compound of the presentinvention is applied to stems and leaves of plants or soils forcultivating plants, the application rate of the compound of the presentinvention is within the range of 1 to 500 g per 1,000 m².

The emulsifiable concentrates, the wettable powders, or flowables etc.are usually applied by diluting them with water, and then spreadingthem. In this case, the concentration of the compound of the presentinvention is usually 0.0005 to 2% by weight. The dusts or the granules,etc. are usually applied as itself without diluting them.

The compound of the present invention can be used as an agent forcontrolling plant diseases in a farmland such as fields, paddy fields,lawns, and orchards.

Examples of the plant diseases which may be controlled by the compoundof the present invention include those due to plant pathogens such asfilamentous fungi and bacterium, and more specifically include thefollowings. The descriptions in the below-mentioned parenthesisrepresent a scientific name of the pathogenic fungi which causes thecorresponding plant diseases.

Rice diseases: blast (Magnaporthe grisea), brown spot (Cochliobolusmiyabeanus), sheath blight (Rhizoctonia solani), bakanae disease(Gibberella fujikuroi), and downy mildew (Sclerophthora macrospora);Wheat diseases: powdery mildew (Blumeriagraminis), fusarium head blight(Fusarium graminearum, F. avenaceum, F. culmorum, Microdochium nivale),yellow rust (Puccinia striiformis), black rust (Puccinia graminis),brown rust (Puccinia recondita), snow mold (Microdochium nivale,Microdochium majus), typhula snow blight (Typhula incarnata, Typhulaishikariensis), loose smut (Ustilago tritici), stinking smut (Tilletiacaries, Tilletia controversa), eyespot (Pseudocercosporellaherpotrichoides), glume blotch (Stagonospora nodorum), tan spot(Pyrenophora tritici-repentis), damping-off caused by rhizoctonia fungus(Rhizoctonia solani), and take-all disease (Gaeumannomyces graminis);

Barley diseases: powdery mildew (Blumeria graminis), fusarium headblight (Fusarium graminearum, Fusarium avenaceum, Fusarium culmorum,Microdochium nivale), yellow rust (Puccinia striiformis), black rust(Puccinia graminis), brown rust (Puccinia hordei), dwarf leaf rust(Puccinia hordei), loose smut (Ustilago nuda), scald (Rhynchosporiumsecalis), net blotch (Pyrenophora teres), spot blotch (Cochliobolussativus), leaf stripe (Pyrenophora graminea), Ramularia leaf spotdisease (Ramularia collo-cygni), and damping-off caused by rhizoctoniafungus (Rhizoctonia solani);

Corn diseases: rust (Puccinia sorghi), southern rust (Pucciniapolysora), northern leaf blight (Setosphaeria turcica), tropical rust(Physopella zeae), southern leaf blight (Cochliobolus heterostrophus),anthracnose (Colletotrichum graminicola), gray leaf spot (Cercosporazeae-maydis), eyespot (Kabatiella zeae), phaeosphaeria leaf spot disease(Phaeosphaeria maydis), Diplodia (Stenocarpella maydis, Stenocaipellamacrospora), stalk rot (Fusarium graminearum, Fusarium verticilioides,Colletotrichum graminicola), and smut (Ustilago maydis);

Cotton diseases: anthracnose (Colletotrichum gossypii), grey mildew(Ramularia areola), alternaria leaf spot (Alternaria macrospora,Alternaria gossypii), and Black root rot caused by Thielaviopsis fungus(Thielaviopsis basicola);

Coffee diseases: rust (Hemileia vastatrix) and leaf spot (Cercosporacoffeicola);

Rapeseed diseases: sclerotinia rot (Sclerotinia sclerotiorum), gray leafspot (Alternaria brassicae), Phoma stem canker and Phoma leaf spot(Phoma lingam);

Sugarcane disease: rust (Puccinia melanocephela, Puccinia kuehnii);

Sunflower diseases: rust (Puccinia helianthi) and downy mildew(Plasmopara halstedii);

Citrus diseases: melanose (Diaporthe citri), scab (Elsinoe fawcetti),green mold (Penicillium digitatum, Penicillium italicum), andPhytophthora disease (Phytophthora parasitica, Phytophthoracitrophthora);

Apple diseases: blossom blight (Monilinia mali), valsa canker (Valsaceratosperma), powdery mildew (Podosphaera leucotricha), Alternaria leafspot (Alternaria alternata apple pathotype), scab (Venturia inaequalis),anthracnose (Glomerella cingulata), blotch (Diplocarpon mali), ring rot(Botryosphaeria berengeriana), and crown rot (Phytophthora cactorum);

Pear diseases: scab (Venturia nashicola, Venturia pirina), black spot(Alternaria alternata Japanese pear pathotype), and rust(Gymnosporangium haraeanum);

Peach diseases: brown rot (Monilinia fructicola), scab (Cladosporiumcarpophilum), and Phomopsis rot (Phomopsis sp.);

Grapes diseases: anthracnose (Elsinoe ampelina), ripe rot (Glomerellacingulata), powdery mildew (Uncinula necator), rust (Phakopsoraampelopsidis), black rot (Guignardia bidwellii), downy mildew(Plasmopara viticola);

Diseases of Japanese persimmon: anthracnose (Gloeosporium kaki) and leafspot (Cercospora kaki, Mycosphaerella nawae);

Diseases of gourd family: anthracnose (Colletotrichum lagenarium),powdery mildew (Sphaerotheca fuliginea), gummy stem blight (Didymellabryoniae), corynespora leaf spot (Corynespora cassiicola), Fusarium wilt(Fusarium oxysporum), downy mildew (Pseudoperonospora cubensis),Phytophthora rot (Phytophthora sp.), and damping-off (Pythium sp.);

Tomato diseases: early blight (Alternaria solani), leaf mold(Cladosporium fulvum), cercospora leaf mold

(Pseudocercospora fuligena), late blight (Phytophthora infestans) andpowdery mildew (Leveillula taurica);

Eggplant disease: brown spot (Phomopsis vexans) and powdery mildew(Erysiphe cichoracearum);

Diseases of brassica family: Alternaria leaf spot (Alternaria japonica),white spot (Cercosporella brassicae), clubroot (Plasmodiophorabrassicae), and downy mildew (Peronospora parasitica);

Welsh onion disease: rust (Puccinia allii);

Soybean diseases: Cercospora leaf blight and purple stain (Cercosporakikuchii), Sphaceloma scab (Elsinoe glycines), pod and stem blight(Diaporthe phaseolorum var. sojae), rust (Phakopsora pachyrhizi), targetspot (Corynespora cassiicola), anthracnose (Colletotrithum glycines,Colletotrichum truncatum), Rhizoctonia rot (Rhizoctonia solani),septoria brown spot (Septoria glycines), frog eye leaf spot (Cercosporasojina), stem rot (Sclerotinia sclerotiorum), powdery mildew(Microsphaera diffusa), phytophthora root and stem rot (Phytophthorasojae), downy mildew (Peronospora manshurica), and sudden death syndrome(Fusarium virguliforme);

Kidney bean diseases: stem rot (Sclerotinia sclerotiorum), rust(Uromyces appendiculatus), angular leaf spot (Phaeoisariopsis griseola),and anthracnose (Colletotrichum lindemuthianum);

Peanut diseases: leaf spot (Cercospora personata), brown leaf spot(Cercospora arachidicola), and southern blight (Sclerotium rolfsii);

Garden pea disease: powdery mildew (Erysiphe pisi);

Potato diseases: early blight (Alternaria solani), late blight(Phytophthora infestans), pink rot (Phytophthora erythroseptica),powdery scab (Spongospora subterranea f. sp. subterranea), andVerticillium wilt (Verticillium albo-atrum, Verticillium dahliae,Verticillium nigrescens);

Strawberry disease: powdery mildew (Sphaerotheca humuli);

Tea diseases: net blister blight (Exobasidium reticulatum), white scab(Elsinoe leucospila), gray blight (Pestalotiopsis sp.), and anthracnose(Colletotrichum theae-sinensis);

Tabacco diseases: brown spot (Alternaria longipes), anthracnose(Colletotrichum tabacum), downy mildew (Peronospora tabacina), and blackshank (Phytophthora nicotianae);

Sugar beet diseases: cercospora leaf spot (Cercospora beticola), leafblight (Thanatephorus cucumeris), root rot (Thanatephorus cucumeris),and aphanomyces root rot (Aphanomyces cochlioides), rust (Uromycesbetae); Rose diseases: black spot (Diplocarpon rosae) and powdery mildew(Sphaerotheca pannosa);

Chrysanthemum diseases: leaf blight (Septoria chrysanthemi-indici) andwhite rust (Puccinia horiana);

Onion diseases: Botrytis leaf blight (Botrytis cinerea, B. byssoidea, B.squamosa), gray-mold neck rot (Botrytis alli), and small sclerotial(Botrytis squamosa);

Various crops disease: Sclerotinia rot (Sclerotinia sclerotiorum);

Japanese radish disease: Alternaria leaf spot (Alternaria brassicicola);

Turfgrass diseases: dollar spot (Sclerotinia homoeocarpa), and brownpatch and large patch (Rhizoctonia solani);

Banana disease: Sigatoka disease (Mycosphaerella fijiensis,Mycosphaerella musicola); Seed diseases or diseases in the early stagesof the growth of various crops caused by fungi from genera ofAspergillus, Penicillium, Fusarium, Gibberella, Tricoderma,Thielaviopsis, Rhizopus, Mucor, Corticium, Phoma, Rhizoctonia, Diplodia,and the others;

Viral diseases of various crops mediated by genera of Polymyxa,Olpidium, or the others; and

rice damping-off (Burkholderia plantarii);

cucumber phytophthora blight (Phytophthora capsici), damping-off(Pythium ultimum) and cucumber bacterial spot (Pseudomonas syringae pv.Lachrymans);

eggplant bacterial wilt (Ralstonia solanacearum);

citrus canker (Xanthomonas citri);

Chinese cabbage slimy soft rot (Erwinia carotovora); and the others.

EXAMPLES

Hereinafter, the present invention is explained in more detail by usingPreparation example and Test example, however, the present inventionshould not be limited to these examples.

First, the Preparation example is shown.

Preparation Example

Six hundred fifty (650) milligrams of the above-mentioned compoundrepresented by formula (A) and 223 mg of potassium cyanate were added toa mixture of 2.6 g of xylene and 1.3 g of acetic acid, and the resultingmixture was stirred at room temperature for 11 hours. Aqueous sodiumhydrogen carbonate solution was added to the resulting mixture to adjustthe pH of the aqueous layer to 6, and the mixture was extracted withethyl acetate. The resulting organic layer was washed with saturatedsaline and concentrated under reduced pressure. The resulting residueswere subjected to a silica gel chromatography to give 342 mg of thePresent compound.

¹H-NMR (CDCl ₃, 23° C.) 5 (ppm): 7.90-7.89 (1H, m), 7.33-7.24 (2H, m),7.18 (0.4H, br), 7.09 (0.6H, br), 7.01-6.88 (2H, m), 5.75 (0.4H, br),4.99-4.84 (2H, m), 4.16 (2H, q, J=7.0 Hz), 3.19-3.00 (2H,m), 2.42 (0.6H,br), 1.27 (3H, q, J=7.0 Hz).ESI-MS (posi): 522 [M+H]⁺

Next, the test examples are shown.

In the test examples 1 to 4, a non-treated area means an area in which atest was conducted in the same manner as each test example, except thatdimethyl sulfoxide was dispensed in place of the present compounddiluted with dimethyl sulfoxide.

Test Example 1 Test for Controlling Cucumber Phytophthora Blight Fungi(Phytophthora Capsici)

Four point five (4.5) milligrams of the present compound was dilutedwith 100 μL of dimethyl sulfoxide. One (1) μL portion of the dilutedliquid was dispensed into a titer plate (96 wells), and thereto was thendispensed 150 μL of a potato dextrose broth medium (PDB medium)containing zoospores of cucumber phytophthora blight fungi (Phytophthoracapsici). This plate was cultured at 27° C. for three days, therebyallowing the cucumber phytophthora blight fungi to undergoproliferation, and the absorbance at 600 nm of each well of the titerplate was then measured to determine a degree of growth of the cucumberphytophthora blight fungi. The efficacy was calculated from thedetermined degree of growth by the below-mentioned “Equation 1”. As aresult, the efficacy of the Present compound was 90% or more.

“Equation 1”

Efficacy=100×(X−Y)/X

whereX: Degree of fungal growth in non-treated areaY: Degree of fungal growth in treated area

Test Example 2 Test for Controlling Damping-Off Fungi (Pythium Ultimum)

Four point five (4.5) milligrams of the present compound was dilutedwith 100 μL of dimethyl sulfoxide. One (1) μL portion of the dilutedliquid was dispensed into a titer plate (96 wells), and thereto was thendispensed 150 μL of a Czapek medium containing mycelial suspension ofdamping-off fungi (Pythium ultimum). This plate was cultured at 23° C.for five days, thereby allowing the damping-off fungi to undergoproliferation, and the absorbance at 600 nm of each well of the titerplate was then measured to determine a degree of growth of thedamping-off fungi. The efficacy was calculated from the determineddegree of growth by the above-mentioned “Equation 1”. As a result, theefficacy of the Present compound was 90% or more.

Test Example 3 Test for Controlling Damping-Off Fungi (Pythium Ultimum)

One point one two (1.12) milligrams of the present compound was dilutedwith 100 μL of dimethyl sulfoxide. One (1) μL portion of the dilutedliquid was dispensed into a titer plate (96 wells), and thereto was thendispensed 150 μL of a Czapek medium containing mycelial suspension ofdamping-off fungi (Pythium ultimum). This plate was cultured at 23° C.for five days, thereby allowing the damping-off fungi to undergoproliferation, and the absorbance at 600 nm of each well of the titerplate was then measured to determine a degree of growth of thedamping-off fungi. The efficacy was calculated from the determineddegree of growth by the above-mentioned “Equation 1”. As a result, theefficacy of the Present compound was 90% or more.

Test Example 4 Test for Controlling Barley Scald Fungi (RhynchosporiumSecalis)

Four point five (4.5) milligrams of the present compound was dilutedwith 100 μL of dimethyl sulfoxide. One (1) μL portion of the dilutedliquid was dispensed into a titer plate (96 wells), and thereto was thendispensed 150 μL, of a potato dextrose broth medium (PDB medium) towhich spores of barley scald fungi (Rhynchosporium secalis) wereinoculated in advance. This plate was cultured at 18° C. for seven days,thereby allowing the barley scald fungi to undergo proliferation, andthe absorbance at 600 nm of each well of the titer plate was thenmeasured to determine a degree of growth of the barley scald fungi. Theefficacy was calculated from the determined degree of growth by theabove-mentioned “Equation 1”. As a result, the efficacy of the Presentcompound was 90% or more.

INDUSTRIAL APPLICABILITY

The compound of the present invention has efficacies for controllingplant diseases, and is useful as an active ingredient for an agent forcontrolling plant diseases.

1. A compound represented by formula (1):


2. An agent for controlling a plant disease which comprises the compoundaccording to claim
 1. 3. A method for controlling a plant disease whichcomprises applying an effective amount of the compound according toclaim 1 to a plant or soil for cultivating the plant.
 4. (canceled)